ΔE 15.4, loose: different enough that you should pick on purpose. Crimson is much more saturated, warmer than Eye of Terror.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 15). Crimson is much more saturated, warmer than Eye of Terror.
The same difference applies the other way round: Eye of Terror is much more muted, cooler.
ΔE is the colour difference between our two swatch estimates: under about 6 is close, over about 15 is loose. Real paints also differ in finish, coverage and how they thin, so test before you commit.
See Eye of Terror on the colour wheel See Crimson on the colour wheel
All matches: Eye of Terror equivalents · Crimson equivalents